回复：回复：学校的HR的头给的"Offer Letter"是有效的

Radiology, many thanks for your information. Based on your information, offer letter from Division chief won't help even option 3 said something leading to this conception?

By the way, it seems allmost all researchers (maybe except NIH researchers) including professors at Harvard University are supported completely or partially by grant money, do you know the CIS people will always ask for the money source?